Fountain pen



Sept. 23, 1924.

FOUNTAIN PE N Filed Aug. 2o ."1925 INVENTOR J [DELMAM 29M? @Mm/@WM ATTORNEYS Patented Slept. 23, 1924.

UNnEDsTATEs PATENT OFFICE.

l JACOB EDELIAN, OF BROOKLYN, NEW YORK, ASSIGNOR TO BOSE ,EDELHANZ FOUNTAIN PEN.

Application nica August 2o, man serial No. 658,336.

To all whom t may concern:

Be it known that I, JACOB EDELMAN, 'a citizen of Ukrania, and resident of Brooklyn, in the county of Kings and vState of New York, have invented certain new and useful Improvements in Fountain Pens, of which the following is a specification.

,My present invention relates to fountain pens and is more particularly concerned with pens of the self-filling t pe.

It 1sy among the objects o the invention to provide a fountain en of conventional external appearance, t e filling appurtenances of which occupy a minimum of the volume within the pen so that a maximum space is afforded for ink.

It is another object to provide a penjof the above type in hich the filling operation can be expeditiously performed without likelihood of parts jammin or the -hands becoming soiled and all o lthe parts of which shall be of relatively permanent charl acter, not subject to deterloration by contact with the ink or with the air.

Another ob'ect of the invention is to provide a pen o the above type which can be .expeditlously and economically `'manufactured. Other objects will be in part obvious and in art pointed out hereinafter.

n the accompanying drawings inwhicli are shown one or more of the various possible embodiments of the several features of this invention,

Fig. 1 is a view in longitudinal crosssection of the pen immediately preparatory to drawing in a charge of ink.

Fig. 2 is a fragmentary sectional view on Va greatly enlarged scale of the upper end of the pen showing the parts telescoped,

Figs. 3 and 4.- are transverse sectional views taken res ctively along the lines 3-3 and 4 4 .of ig. 2, y

5 is a fra mentary sectional view sho a modified for'm of connection between e operating cap and the stem.

Fi 6 is a sectional view taken along lthe line of Fig; 5,

Fig. 7 is a a entary view enerally similar to Fig. 6 o a further modi ed form showing the stem extended, and

Fig. 8 is a fragmentary sectional view showln rel in time embodiment of Fig.

Referring now to the drawings, I have the relation of the cap to the bar-A shown a fountain pen includin a barrel 10 having threaded thereinto the eed piece 11 with the usual feed 12 and pen point 13. A

over the rtelescoped stem sections so that the" plunger 14 is normall near the top of the barrel and substantie ly the entire volume cfk the barrel is available for containing m In the preferred embodiment, the lower- .most section of the telescoping stem is a rod 15 which may be of brass threaded into a "ulcanite stud member 21 having a head 22 pressed by means of a nut 23 about the stud against the outer surface preferably of a cork plunger washer 24. The rod 15 has a transverse pin 25 preferably square in cross-section fitting into a slot 26 in the tubular stemsection 16. The slot 26'has an offset 27 extending toward the left to form a bayonet connect1on,'said offset referably at right angles to the length of) the slot. t the upper end the tube section 26 has a pair of diametrically opposite preferably square protruding lugs 28 which may be either riveted thereto or embossed orpressed cap 19 is connected to the stem section 18 by a air of pins 32 secured in the lower end otp said cap and projecting inward therefrom into bayonet slots 33 in an enlargement 331l at the upper end of section 181, the oisetfof said slot extending in the direction o posite to the offsets 27 in thev slots of t e various stem sections, that is toward the right. The barrel is preferably provided with an lintegral inner led 34 immediately below the screw threade end l31 and 32 will be moved longitudinally of the associated slots to draw the telescoped sections apart and in the continued rotary action, the pins will move into the lateral offsets as best shown in Fig. 1, the pins 32 on the cap similarly moving into lateral slot offsets 33. The cap is now pushed inward, the pins thereon delivering the thrust through the bayonet slots in the outer tube section 18 which latter transmits the thrust section, etc., the extended sections forming a relatively rigid stem to force the plunger 14 down to the bottom of the barrel. The parts as shown are proportioned so that when the cap reaches contact with the barrel, the plunger will have substantially reached the feed piece, the head 22 of the stud in that relation rotruding into close contiguity to the feed) piece 12. The pen being now dipped into the well of ink, a sin e withdrawal action of the cap piece wil suiiiceto ill the barrel completely with ink, the plunger bein limited in this action by contact against t e integral stop ledge 34. The pen being now filled, the cap is returned to its home osition by rotating it toward the vright w ile pushin inward thereon. lIn this operation, it wil be 'seen that the `various' pins will move out of the offsets of the bayonet slots and will then move lengthwise of said slots for collapse of the stem. After the ca is brought into contact with the barrel, it 1s threaded thereonto as best shown in Fig. 2, said final threading operation advancing the cap a distance only in the order of about fg, so that the plunger 14 is advanced inward through a minute range, aiding in feeding the ink toward the pen point whereby Writing can be easily started without shaking the en.

It will be seen that according to the present invention, the collapsed plunger stem is accommodated in the cap piece 19 beyond the barrel, so that the entire length and cross-section of the barrel may be filled with ink by operation of cap .19 as distinguished from pens in which the plunger stem or air tubes occupy an appreciableor substantial pro ortion of the volume within the barrel.

y pen, however, is substantial] conventional in external appearance wit out rotrudin screws o ratin levers o r han les.

The ayonet s ots having offsets at right angles to the length of the tubes, it will be seen that with a minimum length of section, a maximum length of plunger stem is pro-V vided, so that the length of the collapsed stem is accommodated in a cap piece of con'iparatively short length, as distinguished from constructions in which the bayonet slots are provided with reversely bent ends.

The plunger construction shown, effectively maintains the ink out of contact with the stem which b reason of its collapsing construction can lie readily produced only of metal, and at the present state of technical development, metal parts capable of resisting the erosive effect of ink would add excessively to theI cost of the pen.

In Fig. 5 is shown an alternative embodiment generally similar to Figs. 1 and 2 except that in lieu of the bayonet slot connection between the operating cap 19 and the first section 181, I provide a reversed construction in which lugs 35 are pressed outward from the upper end of stem section 181 and tit into a slot 36 with a rectangular ofi"- set 37 at its lower end forming a bayonet slot preferably in a metallic inset sleeve 38 press-fitted within the cap piece 19.

In Fig. 7 is shown a further alternative embodiment in which I provide in the upper tubular stem section 182 two pairs of lon itudinal slots, one pair 39 of diametricallly opposite slots having offsets 40 at their lower ends extending toward the left for accommodatting pins 41 in the succeeding stem section 172, and the other pair of slots 42 midway between said first pair, having offsets 43 at their upper ends extending toward the right to accommodate lugs 44 protruding inward from cap 192. By this construction it will be seen that stem section 182 may be of larger diameter than in the other embodiments, and may in fact fit closely within cap 192. It would therefore be practicable to employ a stem of five rather than four sections in this case, so that the cap 192 could be made correspondingly shorter. In Fig. 7 I have also indicated 1n lieu of the threaded connection between the cap 192 and the barrel 102 a bayonet slot connection 45, the bayonet slot in the barrel ing preferably undercut so that the pms therefor protruding from the cap 192 w1ll not be visible when the pen is in assembled or closed position, as shown in Fig. 8. As shown, the pins coacting with bayonet slots 45 may be integral projections of lugs 44.

It will thus be seen that there is herein described apparatus in which the several features of this invention are embodied, and which apparatus in its action attains the Avarious objects of the invention and is well suited to meet the requirements of practical use.

As many changes could be made in the above construction and many a parently widely different embodiments of t 1s invention could be made without departing from the scope thereof, it is intended that all matter contained in the7 above description or shown in the accompanying drawing shall be .interpreted as illustrative and not in a. limiting sense.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

tween said cap and the outer of the steml sections, said stem sections normally telescoped with respect to each other and into said cap with the plunger retained in outermost position in the barrel, said parts.

being constructed and arranged in such man ner that in the unthreading and withdrawal movement of the ca the plunger stem becomes extended an the` bayonet slot connectionsrendered effective for plunger operation, and in the replacement of the ca the telescoping connections become release and i the stem collapsed within the c ap. f

2. In .a fountain pen, in combination a barrel, -a plunger therein, an operatin stem for said plunger comprising a plura ity of telescoping sections, each havin a bayonet Y slot connection with respect to t e consecu` bayonet locks are automatically established tive one, an operating *and housing cap for said plunger, releasably threaded to the end of said barrel, said cap having) at the end thereof nearest the arrel pro]ect ing into a/bayonet slot in the outer stem section, lthe offset end of whichslot extends in a direction opposite that of the offsets of the bayonet slot connections between the telescoping stem sections whereby in unthreadin the cap and' drawing it outward, the cap an v stem enter into extended position and rn the continued rota di lacement of thecap in the unthrearding tion, the various bayonet pins y to form a relatively rigid stem for operating the plunger andwhereby in the rotation of the cap toward locking position, the bayonet locks are released and 1n the return of the cap toward the cap, the stem becomes automatically collapsed into the barrel.

3. In a fountain pen, in combination, a barrel, a filling plunger therein, a telescoping operating) stem for said plunger, an operating mem er connected to the outer section of said stem, said voperating member comprising a cap releasably threaded upon said barrel, bayonet slot connections between successive stem sections, and a bayonet slot connection between the outer stem section and said cap, said connection comprising pins rigid with said outer section and a sleeve rigidly telescoped into said cap and, having bayonet slots into which said pins extend. l

4f. In a fountain pen, in combination, a barrel, a plunger therein, an operatingstem therefor-comprising a rod connected to the plunger and a plurality of tubularA telescoping sections, said rodhaving transverse lugs fitting in a pair of corresponding bayonet slots lengthwise of the contiguous section and similar bayonet slot connections between each tubular section and the succeeding one, and pins projecting inward from the cap into the second pair of bayonet slots in the outer or extreme section of the telescoping stem. y

5. In a fountain pen,.in combination, a plunger comprising a washer of cork, a solid stud on the stem slde of thewasher of vulcanite through Isaid plunger and having a head of diameter smaller than that of said plunger, a metallic operating stem for said plunger threaded into said stud and a nut threaded about said stud to clamp the head of the stud against said washer.

' Signed at NewYork, in the county of New York and 4Stat/e of New York, this 11th day of August, 1923. r v

.Liteon ,EDELMAN 

